bug#47000: git libtool compiler flag handling busted on HP-UX

Hi Pavel,

On 2021-10-24, Pavel Raiskup <[email protected]> wrote:
> On Monday, March 8, 2021 5:13:23 AM CEST Nick Bowler wrote:
>> On HP-UX 11.11, with libtool 2.4.6,
[...]
>> On investigation, it appears this problem occurs because the func_quote
>> function in libtool attempts to split on backslashes by setting IFS='\'
>> but this procedure appears ineffective on the HP-UX shell.  For example:
>>
>> % IFS='\'
>> % hello='foo\bar\baz'
>> % printf '%s\n' "$hello" $hello
>> foo\bar\baz
>> foo\bar\baz
>
> Thank you for the report!  And sorry for the delay.
>
> Would you mind testing 'make check' from this PR on the affected system?
>
>     https://github.com/gnulib-modules/bootstrap/pull/25

As the Makefile uses the GNU-specific $(shell ...) construction,
"make check" does not work out of the box on HP-UX.  I worked around
the problem by running

  % make abs_aux_dir=$PWD/build-aux abs_srcdir=$PWD/tests check

> I hope I fixed there the problem with IFS='\' (even though it is just a poor
> fallback to the slower SED variant, anyone is welcome to provide better
> solution).
>
> Perhaps there are other problems so it would be nice to see the testsuite
> results.

The output (attached, gzipped) is not entirely obvious to me but I
assume this means everything passed?  As a point of comparison, without
your changes there are many errors reported.

For the record, the empty field bug described in the change log (which
is observed with heirloom-sh and presumably also Solaris 10 /bin/sh)
regarding empty fields does not appear to be a problem on HP-UX 11:

  % var='a::b'; IFS=':'; set dummy $var
  % printf '%s\n' "$#" "$2" "$3" "$4"
  4
  a

  b

Thanks,
  Nick

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